v3.26.3
Segmented Information - Schedule of plant and equipment by geographical location (Details) - USD ($)
$ in Thousands
Sep. 30, 2026
Mar. 31, 2026
Revenues from External Customers and Long-Lived Assets [Line Items]    
Plant and equipment $ 390,649 $ 480,476
ROU asset 104,367 43,096
Total plant and equipment 495,016 523,572
Canada [Member]    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Plant and equipment 111,772 113,646
ROU asset 102,803 41,954
Total plant and equipment 214,575 155,600
Sweden [Member]    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Plant and equipment 9,227 14,076
ROU asset 1,457 1,012
Total plant and equipment 10,684 15,088
Paraguay [Member]    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Plant and equipment 269,650 352,754
ROU asset 0 0
Total plant and equipment 269,650 352,754
Iceland [Member]    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Plant and equipment   0
ROU asset   0
Total plant and equipment   0
Switzerland [Member]    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Plant and equipment   0
ROU asset   0
Total plant and equipment   0
Bermuda [Member]    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Plant and equipment 0 0
ROU asset 107 130
Total plant and equipment $ 107 $ 130